All of these self-styled platforms have already taken editorial actions under the guise of enforcing their TOS, it’s called moderation. Unless what you’re sending is illegal, the post office doesn’t get to pick and choose what it sends; Twitter, Facebook, Google and the rest do. If you want to send porn through the USPS, you can, but try that with FB.

The “platform” excuse is dead on the first real legal challenge. It’s past time for these publishers to be held to the standards other publishers have been held to for decades or longer. They can’t cry “free speech” on one hand while acting like publishers on the other. When it was just galling hypocrisy fair enough, but they’re big enough and have supplanted enough “traditional media” that their time has come.